<div 
  class="container" 
  [ngStyle]="{
    'grid-template-columns': templateColumns,
    'grid-template-rows': templateRows 
    }"
    (scroll) = "handleScroll($event)"
>
  <ng-content select="[appGridItem]"></ng-content>
</div>
<div class="underline" *ngIf="scrollable">
    <div class="highligh" [ngStyle]="{'margin': sliderMargin}"></div>
</div>
